python中的加减法
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How to add and subtract in python
提问by user3337936
So I am making a statcalc and everything is working except adding. When I select the option to add it just skips it and says select an option. I was wondering what's wrong with it?
所以我正在制作一个 statcalc，除了添加之外，一切都在工作。当我选择添加它的选项时，只是跳过它并说选择一个选项。我想知道有什么问题吗？
numberstoadd = input("What is the first number you want to add? ")
numbertoadd = input("What do you want to add to it? ")
sum = numbertoadd + numberstoadd
print sum
回答by U2EF1
You need to turn your input strings into ints. Like this:
您需要将输入strings 转换为ints。像这样：
number_1 = int(raw_input("What is the first number you want to add? "))
number_2 = int(raw_input("What do you want to add to it? "))
sum = number_1 + number_2
print sum
回答by Peter Gibson
In Python 2, inputwould evalthe typed text and return an integer, whereas under Python 3 inputjust returns a stringcontaining the typed text (equivalent to raw_inputin Python 2).
在 Python 2 中，输入的文本input会eval返回一个整数，而在 Python 3 下input只返回一个string包含输入的文本（相当于raw_input在 Python 2 中）。
See this link for other changes between Python version 2.x & 3.x
有关 Python 版本 2.x 和 3.x 之间的其他更改，请参阅此链接
回答by AKI
print("Welcome to fizz buzz")
num1=input("Choose a number from 1 to 100")
if num1 is >= 50:
print("hello")
else:
print("good bye")
回答by user12826762
Sample Input 0
样本输入 0
2
2
1 3
1 3
10 100
10 100
Sample Output 0
样本输出 0
-2
-2
-90
-90
Given a two integers print the difference of two integers.
给定一个两个整数，打印两个整数的差。
*Hint: Try to implement without using '-' operator.
*提示：尝试在不使用“-”运算符的情况下实现。
